diff --git a/Hcs.Broker/Api/Request/GostSigningMessageInspector.cs b/Hcs.Broker/Api/Request/GostSigningMessageInspector.cs
index 2db1f26..dc1b7ae 100644
--- a/Hcs.Broker/Api/Request/GostSigningMessageInspector.cs
+++ b/Hcs.Broker/Api/Request/GostSigningMessageInspector.cs
@@ -2,7 +2,6 @@
 using CryptoPro.Security.Cryptography.X509Certificates;
 using CryptoPro.Security.Cryptography.Xml;
 using Hcs.Broker.Internal;
-using System.Security;
 using System.Security.Cryptography;
 using System.ServiceModel;
 using System.ServiceModel.Channels;
@@ -146,8 +145,9 @@ namespace Hcs.Broker.Api.Request
 
             signedXml.ComputeXadesSignature();
 
+            var element = doc.SelectNodes("//*[@Id='" + Constants.SIGNED_XML_ELEMENT_ID + "']")[0];
             var xmlDigitalSignature = signedXml.GetXml();
-            doc.DocumentElement.AppendChild(doc.ImportNode(xmlDigitalSignature, true));
+            element.AppendChild(doc.ImportNode(xmlDigitalSignature, true));
 
             if (doc.FirstChild is XmlDeclaration)
             {